Here it is. The bible of Japanese grammar; possibly the one reference a serious student of Japanese really can’t do without.
The Japan Times’ A Dictionary of Basic Japanese Grammar is packed with essential, truly useful grammar. Each entry begins with a brief explanation of a grammatical pattern then further illustrated via simple examples. Formation notes and additional dialogue samples elaborate on nuances. Entries are organized alphabetically for quick reference.
When you’re first learning to speak, this reference is a great way to identify and incorporate the speech patterns you hear in conversation around you. I’d been studying Japanese for a full two years before this was finally recommended to me, and my spoken Japanese ability improved dramatically once I began to use the grammar dictionary on a daily basis.